Door-operating device



Nov. 11, 1930. MORROW DooR OPERATING DEVICE Filed Sept. 10. 1927 SSheets-Sheet 1 ATTO R N EY Nov. 11, 930. I. E. MORROW 1,781594 DOOR OPERATING DEVICE Filed Sept. 10. 1927 3 Sheets-Sheet 2 w, m Y W/A'Lj' 0 k m\ r ZEM'OrrOw INVENTOR ATTO R N EY Nov. 11, 1930. o ow 1,781,594

DOOR OPERATING DEVICE Filed Sept. 10. 1927 3 Sheets-Sheet 3 INVENTOR ATTORN EY Patented Nov. 11, 1930 UNITED STATES- ISAAC E. MoRRow, onpAtLAs; TEXAS DOOR-OPERATING DEVICE Application filed September 10, 1927. Serial No. 218,691.

p This invention relates to door operating mechanisms especially adapted for operating the doors of garages, or other doors through which vehicles are adapted to pass.

An object of the present invention is to provide a door operating mechanism wherein the weight of a vehicle approaching the doors will act to automatically open the latter so as to enable the vehicle to pass through the 0 doorway without requiring the doors to be manually operated. Another object of the invention is the provision of a mechanism which in addition to the above and other advantages, is simple and novel in construction and may be readily arranged in position for use without the necessity of providing pits or troughs for housing portions of the mechanism.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims. In the drawings Figure l is a plan view of the invention, the doors and the adjacent portions of a building or other walls being shown in section.

Figure 2 is a side elevation with one of the doors shown in section.

Figure 3 is a front elevation of a building with the invention in place.

Figure 4- is an enlarged fragmentary section on the line 44L of Figure 1.

1 Figure 5 is a similar View on the line 5-5 of Figure 1.

Figure 6 is a detail illustrating a slightly diiferent manner of mounting the flexible member guide.

Referring to the drawings in detail wherein like characters of reference denote corresponding parts, the reference character 10 indicates a pair of doors which may be applied to agarage or other building 11 for 5 the purpose of closing the doorway 12.

The invention which is designed for the purpose of opening the doors through the weight of a vehicle comprises a pair of frames 13, one of which is located at each side of the doorway. These frames include standards 14 and 15 whichare connected by means of horizontal bars 16.

Each of the standards 14 is provided with a slot 17 which forms a guide for the end of a bar 18; This bar is thus mounted for vertical slidingmovement transversely of and spaced from the doorway Pivotally secured to the bar 18 adjacent each of the frames 13', through the medium of straps 19, are the adjacent ends oftreadle plates 20. These plates are arranged in alined pairs with their adjacent ends normally elevated so that they may be depressed by the weight of a vehicle. P'ivotally'mounted at the upper end of each of the standards let as shown at 21 is a lever 22. Secured to one end of each of the levers 22 is a flexible member or chain23; the latter being also secured to the bar 18 adjacent the ends of said bar as in,-; dicated at 24. Secured-to the opposite end of each of the levers 22 is a cable or other flexible member 25. These cables pass around guide pulleys 26 secured'to the stand I ards 15 and around similar pulleys 27 mounted upon the bars 16 and have their 7 ends'secured to the doors as indicated at 28.

When the treadle plates are depressed by the weight of a vehicle the levers 22 will be rocked upon their pivots so that a pull will be exerted upon the cables 25 to open the doors.

In order to close the doors after the vehicle has'passed through, there is secured toeach of the doors a cable 29. This cable passes around guide pulleys 30 and 31 and has connected thereto a weight 32, so that when the plates 20 are relieved of the weight of the vehicle, the weights 32 will. act to close the doors.

' It is preferred to provide the cables 25 and 29 with short coiled spring sections 33 at the points of connection of these cables v with the doors 10 and with the weights 32, in order to take up shock.

If desired, the flexible members 25 may pass around guide pulleys 34:, where the mechanism is used with a double garage and space is restricted. The pulleys 34 may be carried by brackets 35 and the latter SGT-1G0 cured directly to some convenient portion of the garage as indicated at 86.

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention what is claimed is p 1. In combination with a pair of doors, a bar mounted for vertical sliding movement transversely of and spaced from the doors,

a pair of alined treadle plates extending from the doorway at each end thereof and having their adjacent ends pivotally secured to the bar, a lever mounted for pivotal movement above each pair of plates, means connecting one end of eachlever and the slid- 7 ing bar, flexible means connecting the other ends of the bar and doors, whereby when the treadle plates are depressed the doors will be opened and means to close the doors.

2. In combination with a pair of doors, a pair of spaced vertically disposed frames, each of said frames including a standard spaced from the doorway, a horizontal bar extending transversely of and spaced from said doorway and having its opposite ends mounted for vertical sliding movement in the standards, a pair of alined treadle plates extending from the doorway adjacent each frame and having their adjacent ends pivot- "ally secured to the bar, a lever pivotally mounted upon each standard, means connecting one end of each of the levers with the bar to move the levers pivotally when the treadle'plates are depressed, flexible means connecting each of the levers and doors to open the latter when the levers are moved pivotally and means to close the doors.

In testimony whereof I affix my signature.

ISAAC E. MORROVV. 

